* [moderation/CI] Re: inet: Avoid established lookup missing active sk
@ 2025-09-03 19:13 syzbot ci
2025-09-03 21:51 ` Aleksandr Nogikh
0 siblings, 1 reply; 2+ messages in thread
From: syzbot ci @ 2025-09-03 19:13 UTC (permalink / raw)
To: syzkaller-upstream-moderation; +Cc: syzbot
syzbot ci has tested the following series
[v1] inet: Avoid established lookup missing active sk
https://lore.kernel.org/all/20250903024406.2418362-1-xuanqiang.luo@linux.dev
* [PATCH net] inet: Avoid established lookup missing active sk
and found the following issue:
inconsistent lock state in valid_state
Full report is available here:
https://ci.syzbot.org/series/e3eb0778-d6ff-4b0c-ae24-a5451a3472cb
***
inconsistent lock state in valid_state
tree: net
URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
base: 788bc43d8330511af433bf282021a8fecb6b9009
arch: amd64
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
config: https://ci.syzbot.org/builds/4fba502f-1812-45fd-881c-e5889996074b/config
C repro: https://ci.syzbot.org/findings/1fde3273-fc6e-4ca1-9a99-a8f866c822cd/c_repro
syz repro: https://ci.syzbot.org/findings/1fde3273-fc6e-4ca1-9a99-a8f866c822cd/syz_repro
================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
syz.0.17/5984 [HC0[0]:SC0[0]:HE1:SE1] takes:
ffffc90000069958 (&ptr[i]){+.?.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffffc90000069958 (&ptr[i]){+.?.}-{3:3}, at: __inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
{IN-SOFTIRQ-W} state was registered at:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
__inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
tcp_v4_early_demux+0x4e1/0x9d0 net/ipv4/tcp_ipv4.c:1995
ip_rcv_finish_core+0x108e/0x1c00 net/ipv4/ip_input.c:346
ip_list_rcv_finish net/ipv4/ip_input.c:616 [inline]
ip_sublist_rcv+0x397/0x9b0 net/ipv4/ip_input.c:642
ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:676
__netif_receive_skb_list_ptype net/core/dev.c:6034 [inline]
__netif_receive_skb_list_core+0x7d2/0x800 net/core/dev.c:6081
__netif_receive_skb_list net/core/dev.c:6133 [inline]
netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6224
gro_normal_list include/net/gro.h:532 [inline]
gro_flush_normal include/net/gro.h:540 [inline]
napi_complete_done+0x2f2/0x7c0 net/core/dev.c:6593
e1000_clean+0xd0b/0x2b00 drivers/net/ethernet/intel/e1000/e1000_main.c:3815
__napi_poll+0xc7/0x360 net/core/dev.c:7506
napi_poll net/core/dev.c:7569 [inline]
net_rx_action+0x707/0xe30 net/core/dev.c:7696
handle_softirqs+0x286/0x870 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
common_interrupt+0xbb/0xe0 arch/x86/kernel/irq.c:318
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:81
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:757
default_idle_call+0x74/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e8/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147
irq event stamp: 807
hardirqs last enabled at (807): [<ffffffff8184e7fd>] __local_bh_enable_ip+0x12d/0x1c0 kernel/softirq.c:412
hardirqs last disabled at (805): [<ffffffff8184e79e>] __local_bh_enable_ip+0xce/0x1c0 kernel/softirq.c:389
softirqs last enabled at (806): [<ffffffff8962777b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last enabled at (806): [<ffffffff8962777b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
softirqs last enabled at (806): [<ffffffff8962777b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
softirqs last disabled at (798): [<ffffffff8962777b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (798): [<ffffffff8962777b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
softirqs last disabled at (798): [<ffffffff8962777b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&ptr[i]);
<Interrupt>
lock(&ptr[i]);
*** DEADLOCK ***
1 lock held by syz.0.17/5984:
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: inet_diag_find_one_icsk+0x2e/0x790 net/ipv4/inet_diag.c:527
stack backtrace:
CPU: 0 UID: 0 PID: 5984 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_usage_bug+0x297/0x2e0 kernel/locking/lockdep.c:4042
valid_state+0xc3/0xf0 kernel/locking/lockdep.c:4056
mark_lock_irq+0x36/0x390 kernel/locking/lockdep.c:4267
mark_lock+0x11b/0x190 kernel/locking/lockdep.c:4753
mark_usage kernel/locking/lockdep.c:-1 [inline]
__lock_acquire+0x9e2/0xd20 kernel/locking/lockdep.c:5191
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
__inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
__inet_lookup include/net/inet_hashtables.h:408 [inline]
inet_lookup+0xc4/0x290 include/net/inet_hashtables.h:428
inet_diag_find_one_icsk+0x1c1/0x790 net/ipv4/inet_diag.c:529
inet_diag_dump_one_icsk+0xa4/0x520 net/ipv4/inet_diag.c:576
inet_diag_cmd_exact+0x3d5/0x4e0 net/ipv4/inet_diag.c:628
inet_diag_get_exact_compat net/ipv4/inet_diag.c:1406 [inline]
inet_diag_rcv_msg_compat+0x2b5/0x3b0 net/ipv4/inet_diag.c:1428
sock_diag_rcv_msg+0x4cc/0x600 net/core/sock_diag.c:-1
netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
sock_sendmsg_nosec net/socket.c:714 [inline]
__sock_sendmsg+0x21c/0x270 net/socket.c:729
____sys_sendmsg+0x505/0x830 net/socket.c:2614
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
__sys_sendmsg net/socket.c:2700 [inline]
__do_sys_sendmsg net/socket.c:2705 [inline]
__se_sys_sendmsg net/socket.c:2703 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0e1a18ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd085aadc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f0e1a3c5fa0 RCX: 00007f0e1a18ebe9
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007f0e1a211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0e1a3c5fa0 R14: 00007f0e1a3c5fa0 R15: 0000000000000003
</TASK>
***
If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
Tested-by: syzbot@syzkaller.appspotmail.com
---
This report is generated by a bot. It may contain errors.
syzbot ci engineers can be reached at syzkaller@googlegroups.com.
The email will later be sent to:
[davem@davemloft.net edumazet@google.com kernelxing@tencent.com kuba@kernel.org kuniyu@google.com luoxuanqiang@kylinos.cn netdev@vger.kernel.org xuanqiang.luo@linux.dev]
If the report looks fine to you, reply with:
#syz upstream
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [moderation/CI] Re: inet: Avoid established lookup missing active sk
2025-09-03 19:13 [moderation/CI] Re: inet: Avoid established lookup missing active sk syzbot ci
@ 2025-09-03 21:51 ` Aleksandr Nogikh
0 siblings, 0 replies; 2+ messages in thread
From: Aleksandr Nogikh @ 2025-09-03 21:51 UTC (permalink / raw)
To: syzbot ci; +Cc: syzkaller-upstream-moderation, syzbot
#syz upstream
On Wed, Sep 3, 2025 at 9:13 PM syzbot ci
<syzbot+ci5cfb5e22bbd89274@syzkaller.appspotmail.com> wrote:
>
> syzbot ci has tested the following series
>
> [v1] inet: Avoid established lookup missing active sk
> https://lore.kernel.org/all/20250903024406.2418362-1-xuanqiang.luo@linux.dev
> * [PATCH net] inet: Avoid established lookup missing active sk
>
> and found the following issue:
> inconsistent lock state in valid_state
>
> Full report is available here:
> https://ci.syzbot.org/series/e3eb0778-d6ff-4b0c-ae24-a5451a3472cb
>
> ***
>
> inconsistent lock state in valid_state
>
> tree: net
> URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
> base: 788bc43d8330511af433bf282021a8fecb6b9009
> arch: amd64
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> config: https://ci.syzbot.org/builds/4fba502f-1812-45fd-881c-e5889996074b/config
> C repro: https://ci.syzbot.org/findings/1fde3273-fc6e-4ca1-9a99-a8f866c822cd/c_repro
> syz repro: https://ci.syzbot.org/findings/1fde3273-fc6e-4ca1-9a99-a8f866c822cd/syz_repro
>
> ================================
> WARNING: inconsistent lock state
> syzkaller #0 Not tainted
> --------------------------------
> inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
> syz.0.17/5984 [HC0[0]:SC0[0]:HE1:SE1] takes:
> ffffc90000069958 (&ptr[i]){+.?.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
> ffffc90000069958 (&ptr[i]){+.?.}-{3:3}, at: __inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
> {IN-SOFTIRQ-W} state was registered at:
> lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
> __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
> _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
> spin_lock include/linux/spinlock.h:351 [inline]
> __inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
> tcp_v4_early_demux+0x4e1/0x9d0 net/ipv4/tcp_ipv4.c:1995
> ip_rcv_finish_core+0x108e/0x1c00 net/ipv4/ip_input.c:346
> ip_list_rcv_finish net/ipv4/ip_input.c:616 [inline]
> ip_sublist_rcv+0x397/0x9b0 net/ipv4/ip_input.c:642
> ip_list_rcv+0x3e2/0x430 net/ipv4/ip_input.c:676
> __netif_receive_skb_list_ptype net/core/dev.c:6034 [inline]
> __netif_receive_skb_list_core+0x7d2/0x800 net/core/dev.c:6081
> __netif_receive_skb_list net/core/dev.c:6133 [inline]
> netif_receive_skb_list_internal+0x975/0xcc0 net/core/dev.c:6224
> gro_normal_list include/net/gro.h:532 [inline]
> gro_flush_normal include/net/gro.h:540 [inline]
> napi_complete_done+0x2f2/0x7c0 net/core/dev.c:6593
> e1000_clean+0xd0b/0x2b00 drivers/net/ethernet/intel/e1000/e1000_main.c:3815
> __napi_poll+0xc7/0x360 net/core/dev.c:7506
> napi_poll net/core/dev.c:7569 [inline]
> net_rx_action+0x707/0xe30 net/core/dev.c:7696
> handle_softirqs+0x286/0x870 kernel/softirq.c:579
> __do_softirq kernel/softirq.c:613 [inline]
> invoke_softirq kernel/softirq.c:453 [inline]
> __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
> irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
> common_interrupt+0xbb/0xe0 arch/x86/kernel/irq.c:318
> asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693
> native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
> pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:81
> arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
> default_idle+0x13/0x20 arch/x86/kernel/process.c:757
> default_idle_call+0x74/0xb0 kernel/sched/idle.c:122
> cpuidle_idle_call kernel/sched/idle.c:190 [inline]
> do_idle+0x1e8/0x510 kernel/sched/idle.c:330
> cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
> start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
> common_startup_64+0x13e/0x147
> irq event stamp: 807
> hardirqs last enabled at (807): [<ffffffff8184e7fd>] __local_bh_enable_ip+0x12d/0x1c0 kernel/softirq.c:412
> hardirqs last disabled at (805): [<ffffffff8184e79e>] __local_bh_enable_ip+0xce/0x1c0 kernel/softirq.c:389
> softirqs last enabled at (806): [<ffffffff8962777b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
> softirqs last enabled at (806): [<ffffffff8962777b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
> softirqs last enabled at (806): [<ffffffff8962777b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
> softirqs last disabled at (798): [<ffffffff8962777b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
> softirqs last disabled at (798): [<ffffffff8962777b>] rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
> softirqs last disabled at (798): [<ffffffff8962777b>] __dev_queue_xmit+0x27b/0x3b50 net/core/dev.c:4650
>
> other info that might help us debug this:
> Possible unsafe locking scenario:
>
> CPU0
> ----
> lock(&ptr[i]);
> <Interrupt>
> lock(&ptr[i]);
>
> *** DEADLOCK ***
>
> 1 lock held by syz.0.17/5984:
> #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
> #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
> #0: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: inet_diag_find_one_icsk+0x2e/0x790 net/ipv4/inet_diag.c:527
>
> stack backtrace:
> CPU: 0 UID: 0 PID: 5984 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
> Call Trace:
> <TASK>
> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
> print_usage_bug+0x297/0x2e0 kernel/locking/lockdep.c:4042
> valid_state+0xc3/0xf0 kernel/locking/lockdep.c:4056
> mark_lock_irq+0x36/0x390 kernel/locking/lockdep.c:4267
> mark_lock+0x11b/0x190 kernel/locking/lockdep.c:4753
> mark_usage kernel/locking/lockdep.c:-1 [inline]
> __lock_acquire+0x9e2/0xd20 kernel/locking/lockdep.c:5191
> lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
> __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
> _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
> spin_lock include/linux/spinlock.h:351 [inline]
> __inet_lookup_established+0x71d/0x8d0 net/ipv4/inet_hashtables.c:537
> __inet_lookup include/net/inet_hashtables.h:408 [inline]
> inet_lookup+0xc4/0x290 include/net/inet_hashtables.h:428
> inet_diag_find_one_icsk+0x1c1/0x790 net/ipv4/inet_diag.c:529
> inet_diag_dump_one_icsk+0xa4/0x520 net/ipv4/inet_diag.c:576
> inet_diag_cmd_exact+0x3d5/0x4e0 net/ipv4/inet_diag.c:628
> inet_diag_get_exact_compat net/ipv4/inet_diag.c:1406 [inline]
> inet_diag_rcv_msg_compat+0x2b5/0x3b0 net/ipv4/inet_diag.c:1428
> sock_diag_rcv_msg+0x4cc/0x600 net/core/sock_diag.c:-1
> netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2552
> netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
> netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346
> netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896
> sock_sendmsg_nosec net/socket.c:714 [inline]
> __sock_sendmsg+0x21c/0x270 net/socket.c:729
> ____sys_sendmsg+0x505/0x830 net/socket.c:2614
> ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2668
> __sys_sendmsg net/socket.c:2700 [inline]
> __do_sys_sendmsg net/socket.c:2705 [inline]
> __se_sys_sendmsg net/socket.c:2703 [inline]
> __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2703
> do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
> do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
> entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7f0e1a18ebe9
> Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffd085aadc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> RAX: ffffffffffffffda RBX: 00007f0e1a3c5fa0 RCX: 00007f0e1a18ebe9
> RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000003
> RBP: 00007f0e1a211e19 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007f0e1a3c5fa0 R14: 00007f0e1a3c5fa0 R15: 0000000000000003
> </TASK>
>
>
> ***
>
> If these findings have caused you to resend the series or submit a
> separate fix, please add the following tag to your commit message:
> Tested-by: syzbot@syzkaller.appspotmail.com
>
> ---
> This report is generated by a bot. It may contain errors.
> syzbot ci engineers can be reached at syzkaller@googlegroups.com.
>
> The email will later be sent to:
> [davem@davemloft.net edumazet@google.com kernelxing@tencent.com kuba@kernel.org kuniyu@google.com luoxuanqiang@kylinos.cn netdev@vger.kernel.org xuanqiang.luo@linux.dev]
>
> If the report looks fine to you, reply with:
> #syz upstream
>
> --
> You received this message because you are subscribed to the Google Groups "syzkaller-upstream-moderation" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to syzkaller-upstream-moderation+unsubscribe@googlegroups.com.
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^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2025-09-03 21:51 UTC | newest]
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2025-09-03 19:13 [moderation/CI] Re: inet: Avoid established lookup missing active sk syzbot ci
2025-09-03 21:51 ` Aleksandr Nogikh
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